The hospital released a statement on the heartbreaking news Thursday morning. They passed away due to "multiple complex medical complications."

The boys, Chandler and Chance, were delivered by C-section at Georgia Regents Medical Center on Monday and remained in the NICU in the adjoining children's hospital for two days. The hospital said their mother, 26-year-old Brittany Crafton, is in good condition during this difficult time.

Last week, FOX 5 caught up with Crafton. She said during her second ultrasound, the sonogram revealed the babies were sharing more than just a brotherly bond: they shared a heart.

"I didn't see, 'oh... conjoined [twins].' I didn't think about that. I saw two little babies," the first-time mother said, upon seeing her first sonogram.

Crafton said that sight of her twin boys in an embrace deterred any thoughts about terminating her pregnancy, despite the risks.

"How could you do something to two little babies, just looking like they're hugging each other?" she said.

Doctors said the boys shared a heart and liver, suffered from clubfoot and had a dislocated hip, but said the boys had a good prognosis for survival. The hospital previously said the boys could only be surgically separated if one of the babies was given a heart by a donor.

“What makes this case special is that the heart the twins share is quite normal and has been functioning very well for them. So, we believe it will continue to function well after the delivery,” said Dr. Paul Browne of Maternal-Fetal Medicine at Georgia Regents University and Health System, through the hospital's release.

Early Monday morning, Crafton said on her Facebook page the journey hasn't been easy, but it was worth it. She credits God to keeping her strong throughout the pregnancy.

"If I didn't depend on Him as much as I do I would have been stressed out and gave up on my babies a long time ago," she said.

A GoFundMe account was set up to help Crafton and her baby boys. If you would like to donate, click here.